Jest available cop



BEST AVALABLE COP:

Sept. 25, 1923. 1,468,882 C. W. MCKEE ET AL DIMMING SWITCH FOR AUTOMOBILE LIGHTS Filed NOV. 18 1922 llgnlggm m|l..,.\ 1 s ///////////07////////l//////////////////17 Patented Sept. 25, i923. BEST'AVAH- ABLE COP\ ione-mins 'WJ -MxEEf-on nnnnrsnoee, No wrnnnnn "11.

: 1 'f-LPPENNSYLVA'NIA.

f mneom'r; on MARIETTA;

To azzaiampitmycqtm.- 1 i f it known thatweQ-AIL'S W. andf a To', Tnoonn'rgcitizens oflthe United States of America,re sidiiigat,Ha-r' risburg and Marietta, '.re' spe,oftvg ly,i infgtlie counties oi Dauphin andLancaetfer'- respective'lyg and LState .of Peril;,S'YlvaliiagiV ave.

vena; www liew 'analyseur .ments inflDffV ming Sivitclieslfgr Automobile i i svwitolies for lautomobile." ligiglits particulai: ly

'The inventan' compfeh'ndglthegpivsin f; offa switohrnechanism .mounted onA lfth'e steering ahead@ ncffzoigvailwd Tcnnecedinthe 'lighting-5reuit-thefwffier controlling; and varying: .thelights from full briglitness through a- .plurality o i'nte- .mediate positions.;eeefbff position...

various StepsI 'sooo-related thatf-tl1e lights are..neven,extinguishedfbetvveen ste-ps,

only in .thez-f offnfposition, so esto guard lights in v .posgitioning"f le switch in .one of the intermediate positions. In'tllis connection,:the switch is .provided with a dimming step for cutting the lights toailowbrilliancy to provide suliioient light; for parking and yetnot `put Van injurious `load onthe battery. f The inventionalso provides for .a novel structure of Svitch in Whichfthe main body or housingi's moldedfrom insulating material'lia.',i 1g,a plate removably secured with4 in the ,body carrying. all of the .Component ,partrsfof :the 'switch2 proper, While a I cover Aplate rernovablyisecured ,to thebodyprovides access for removing the irst mentioned plate Aandits .pa rts f The invention Vizlcludes the proyisionof a novel switch lever and Contact assemblage,

inwlichgthesvvitch leverorarm is pivotally l .mountedon al, pinparriedvbygthe plate, Vand isi. fulcruined at Oriel-.eril. vvhileY other end carries a Contact brush Whichus orced the; gever plate removed. i.

against .the @.Oxitctlpoiifs .fofmke a e006 Cnnectinand for .keeping the pointsclean hifi-bein' akiallm movable-Qn its 'iivetzand aovidewith @spring amusing. the

@Ver

invention applied thereto. A Eiga 2 is a f-view of the'sivitchgwitn The lnfbody'A-or:

n manga Open as. Lihdiated, et 2f, adapted fQhV-f a 'cover 3 removably secured thereto,- pro- .videdf inteiioily gwith'a .shoulder 4; extending entirely around .thejnside .of the body.

Above;the sl1o'u lder 4j onefend Wall of the -body is providedWith an openingq Vhaving plurality, of notches inl the lower .edge ,indicated ,at 6 foralpu'rpose to bef-described.`

A plate '7 is removably Asecured I Wi'thin the body by any suitable meanSJ-Sudi as-indicated at 8, and is provided on-'its upper face' with a. plurality of Contact points 9 slightly spaced .from leach, otherl and from an arouate'contact 10, and arranged in colicentric relation to a pivot. pinll secured to the plate,4 Av sWitchlever. 12 is pivotally mounted `on pin`1l and axially movable thereon;-4 having; van arm 13. projecting through the opening 5 and Cooperating vv vith vthe notches 6 and an arm 14v .provided ivitli a Contact brush 15, having feet lojbridg'ing landV Contacting with the arcuate v' contact-, l0

and -Contact points 9, so that 'the'b 1juh will overlie one or two of thecontactsandtlie for adjusting the degree of compression oft the coil spring.

resistance element 19 is mounted in.

brackets 20 secured to the bottom of the plate and provided `with a plurality of taps 20 at intervals in the winding, one tap `being yconnected to each vcontact point except :the end point Aat 9b. The' lighting circuit of an automobile on the side'. containing theusualdash switch 21, is broken adjacent the switch and the ei'idsattached to the arcuate Contact l and the Contact 9a respectively as shown in Figs@ and 6.

In thefn-'iring diagram in F ig. 6, the coinplete lighting circuitis' shown Wit-h tlie above described invention properly associated therewith, theliead `lamps 'being indicated at l the tail light 23 and lu dash 'lamp'24-' The battery 25 supplies the current for the lamps, which is controlled by the improved dimming switch, the lights receivingthe full current of the battery when the switchA lever 12 bridges the en d contact 9l1 and contact "10, as sli'oivnfi'n Fig. 6, ivhile the current Supply is diminished' successively as' the switch lever 'is `moved Coward the other end Contact, aportion o the resistance 15) being interposed in the circuit as 'the'lever is'moved successively to 'each Contact away from Contact 9*?. During the movement of the switch lever, thefoot 16 engaging'tlie contacts 9 is always in engagement with the contacts', the foot being ivide enough to bridge'the space bet-Ween the contacts, so that thev lights are never out when the switch lever is moved from one position to the next, but only when the lever is placed in the notch indicating the oli position, at which time the brush l5 contacts vvith the end Contact 9b having no circuit connectioii.

AThe end of the b'ody l is provided with legends indicated Fig. 4t, denoting the positions of the switch 'lever in the notches Afor various degrees of illumina-tion ofthe lain s.

T eyposition of the switch when set fon parlringuthroivs the Whole resistance elementin circuit for 'dimming the lights belo'iv the necessary running brightness, so that'wliilethey provide sufficient light for a .car at. a standstill, yet/the current oonsump'tion is not great enough to drain the battery When left in this .position a considerable length of time.

By the provision of a plurality of suc- BEST AVAILABLE 00;i

cessive steps for dimming the lights merging into one another, due to the brush overlapping tivo contacts, the lights may be gradually dimmed'for an approaching machino on the road, so'tlithe eyes of the driver of said machine may become 'accustomed to the reduced light Without having the blinding eiectv-usuzglly1fresiilting in cutting the lights down in one step. This is an important advantage gained by the use of the.: presentfinvention over similar devices now in use.

`The 'sivit'ch is conveniently mounted on one of the radial arms 'of the steering ivlieel in any suitable manner-,as clearly 'sh'oivn in Fig. 1,' softliatthe vehicle may operate: tlieswitcli vvith'outlremoving his hand fromtliiejsili'eel.Y 9." 4 i' I "What ive claimfis i' f 'i '1- A dimming, Swts'rh fer' litinble lights, comprising a c': asing,T a plate'ireniovablf s'ecurediii Seidljcesng, a resistere@ eeiilt mountedon "the eine, 'antifa-contati mail,

rality Aof connections with said resistance element and zintei'zposecl in the lighting foircuit ofU an automobile ".i" oritroliing the brilliancy of the' through' iiiterpsin'g predetermined porti element infsaid' i '2. A dim :"v'vtchg Aforeinwenig ons' of said fact.; 'mgmt axiallyadjustatiejii rife' gpiate,

with the arcuate 'contazt'aind one or"e more of said contact:pointsfandfhavingIthe other end extending. through -anff'periing in the casing provi ed with"notches vcorrespond A' ing to the contact-points andadapted'or cooperation therewith, a Vplurality of taps atv intervals in said-,resistance connected with respective'v 'ContactE points', land resilient means onithexpivot engaging theleverlfor forcing the brush engagement'ivith said c0ntacts,` the lever beingjulcrum'ed'in the Opening in 'the basing; whereby' 'when' the switch is 'connected in' a lightingvcircuit the switch arm may be' operated to 'placeffpre determined portions of'said 'resistance f in the circuit Afor varying thebi-.lliancy o i the lights. f

3, In a dimming switch,` th efcombination of' a support' having cont-acts thereon, a

switch member `pivotally mounted one point and fulcruinedA at another oilsaid 'support, and 'means formoving said Ineinher on the ulcruin adapted to holdthe'isai'rief'in engagement with saidl contacts.-

4. In a dimming switch, the combination of a support having contacts thereon, a switch member pivotally mounted intermediate its ends on the supportand axially movable on theV pivot, one end engaging the contacts, and the othei` end being fulerumed on the support, and means adj'acentoth BEST AVAILABLE notA In testimony whereof We. affix our signatures. Y

CHARLES W. MGKEE. VILLARD T. TAGGART. 

